| Abstract: | For translationally periodic double-wall carbon nanotubes stable configurations and full symmetry groups are determined. Using this, the phonon dispersions and eigenvectors are calculated and assigned by the complete set of conserved quantum numbers. In particular, the modes corresponding to the relative coaxial motions of the rigid layers are studied in the context of low inter-wall interaction.Received: 19 June 2003, Published online: 9 September 2003PACS: 63.22.+m Phonons or vibrational states in low-dimensional structures and nanoscale materials - 61.46.+w Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals - 78.30.Na Fullerenes and related materials |
